Singer Lee Hyori and Lee Sang-soon were officially invited to the World Ath Fair 'Ath Basel 2023'. Switzerland Tourism Authority announced on the 12th that Lee Hyori and Lee Sang-soon were officially invited to 'Ath Basel 2023' which is held annually in Basel, a cultural and artistic city representing northern Switzerland. 'Ath Basel', held from the 15th to the 18th, is a meeting place for the international art World that connects the World's best galleries and supporters since the 1970s, and is an art event with a Worldwide reputation. This year, more than 284 World-class galleries will gather to showcase the works of more than 4,000 artists. Lee Hyori and Lee Sang-soon will participate in the pre-event, which will be held between 13th and 14th, before the 'Ath Basel' official event. Entering Zurich prior to attending the event, the two embarked on a full-scale journey in Switzerland's central City of Lucerne and Rigisan. In particular, the two enjoyed an eco-friendly trip using public transport in Switzerland, including trains, cruise ships and buses. The two people who have a special interest in the environment are attracted by the fact that they participated in the natural love of the people of Switzerland that the beautiful natural environment should be returned to future descendants. Lee Hyori is appearing on tvN entertainment program 'dance singer a wandering party'.